| 词条 | Dotsero |
| 释义 |
| name = Dotsero | photo = Dotsero LeeSiebert 081066.jpg | photo_caption = Dotsero maar in central Colorado near the junction of the Colorado and Eagle rivers. | elevation_ft = 6783 | elevation_ref = [1] | prominence = | location = Dotsero, Colorado, United States | range = | coordinates = {{coord|39|39|38|N|107|2|6|W|type:mountain|format=dms}}[1] | topo = USGS Dotsero | type = maar[1] | age = Holocene[1] | volcanic_arc/belt = | last_eruption = 2200 BCE ± 300 years[1] | first_ascent = | easiest_route = }}{{location on map | width=200px | left=14px | top=108px | map= | caption=Dotsero near the confluence of the Eagle and Colorado Rivers in Eagle County.}} Dotsero is a {{convert|700|m|ft|sigfig=2|sp=us|adj=on}} wide by {{convert|400|m|ft|sigfig=2|sp=us|adj=on}} deep maar volcano located in Dotsero, Colorado near the junction of the Colorado River and the Eagle River. It is classified as a scoria cone with evaporitic rock, basaltic tephra, and oxidized sandstone. Erupting approximately 4200 years ago, it is the youngest volcano in Colorado. Eruption informationThis Holocene volcano erupted in the year 2220 ± 300 years B.C. When Dotsero blew, it created small scoria cones that were constructed along a NNE-SSW line on either side of the maar.[1] The eruption date is based upon radiocarbon dating of wood found underneath some of the scoria.[2] It is one of the youngest eruptions in the continental U.S. and it produced an explosion crater, a lahar, and a {{convert|3|km|mi|1|sp=us|adj=on}} long lava flow.[1] Dotsero, and all volcanoes that have erupted in the past 10,000 years, are more likely to become active again. The United States Geological Survey considers it a moderate threat to impact air travel if it were to erupt.[3] Interstate 70 cuts across the lava flow. References1. ^1 2 3 4 5 6 {{cite gvp|vn=328010|name=Dotsero|accessdate=2008-08-20}} 2. ^{{cite book | last = Wood | first = Charles A. |author2=Jurgen Kienle | title = Volcanos of North America: United States and Canada | publisher = Cambridge University Press | year = 1990 | location = | pages = | isbn = }} 3. ^{{cite news|url=http://www.postindependent.com/article/20050511/VALLEYNEWS/105110016 |title=Dotsero volcano may erupt|author=Donna Gray |publisher=Glenwood Spring Post Independent |date=11 May 2005 |archiveurl=https://www.webcitation.org/5sXfRJdKp?url=http://www.postindependent.com/article/20050511/VALLEYNEWS/105110016 |archivedate=2010-09-06 |deadurl=yes |df= }} External links
5 : Landforms of Eagle County, Colorado|Diatremes of Colorado|Maars of the United States|Dormant volcanoes|Volcanoes of Colorado |
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